Active Weather Alerts
River Flood Warning
Issued: 2:26 AM May. 1, 2026 – National Weather Service
...FLOOD WARNING NOW IN EFFECT UNTIL SUNDAY AFTERNOON... * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Mississippi River near Herculaneum. * WHEN...Until Sunday afternoon. * IMPACTS...At 28.3 feet, Near this height, the walking trail (extension of Station Road) at Bates Memorial Park begins flooding. * ADDITIONAL DETAILS... - At 8:30 PM CDT Thursday the stage was 26.9 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:30 PM CDT Thursday was 26.9 feet. - Forecast...The river is expected to rise to a crest of 27.1 feet just after midnight tonight. It will then fall below flood stage late Saturday morning. - Flood stage is 26.0 feet. && All Times CDT Fld Observed Forecasts (7:00 am) Location Stg Stage Sat Sun Mon Tue Wed Mississippi River Herculaneum 26.0 26.9 26.2 24.1 21.7 18.6 16.3 &&
River Flood Warning
Issued: 2:21 AM May. 1, 2026 – National Weather Service
...FLOOD WARNING NOW IN EFFECT UNTIL MONDAY EVENING... * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Meramec River near Arnold. * WHEN...Until Monday evening. * IMPACTS...At 27.0 feet, Meramec Bottom Road between Wells Road and Kerth Road begins flooding near this height. * ADDITIONAL DETAILS... - At 9:00 PM CDT Thursday the stage was 27.2 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:00 PM CDT Thursday was 27.2 feet. - Forecast...The river is expected to rise to a crest of 27.5 feet early tomorrow afternoon. It will then fall below flood stage Sunday afternoon. - Flood stage is 24.0 feet. && All Times CDT Fld Observed Forecasts (7:00 am) Location Stg Stage Sat Sun Mon Tue Wed Meramec River Arnold 24.0 27.2 27.0 25.0 22.4 19.4 17.5 &&
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